ASTM F2072-14

Standard Test Method for Hosedown of a Membrane Switch (Withdrawn 2023)

SIGNIFICANCE AND USE
4.1 The presence of water inside a membrane switch can affect its mechanical operation or electrical functionality, or both.  
4.2 This practice establishes a procedure to verify the ability of a membrane switch to resist the entry of liquid into itself or a finished product, or both. It is useful in identifying design deficiencies.  
4.3 Hosedown testing may be destructive, therefore any samples tested should be considered unfit for future use.
SCOPE
1.1 This test method establishes procedures for the hosedown of a membrane switch to verify adequate protection from ingress of water from a high-volume water spray.  
1.2 This test method can also be used to verify the ability of a membrane switch or graphics layer to act as a liquid seal for a finished product.  
1.3 Additional test methods or practices can be incorporated to investigate specific results or capabilities.  
1.4 This test method is a modification of NEMA Publication Number 250-2008 Section 6.7 which is a test for hosedown of a finished product housing.
WITHDRAWN RATIONALE
This test method establishes procedures for the hosedown of a membrane switch to verify adequate protection from ingress of water from a high-volume water spray.
Formerly under the jurisdiction of Committee F01 on Electronics, this test method was withdrawn in January 2023 in accordance with section 10.6.3 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.

General Information

• Status: Withdrawn
• Publication Date: 31-Dec-2013
• Withdrawal Date: 11-Jan-2023
• ICS: 31.220.20 - Switches
• Technical Committee: F01 - Electronics
• Drafting Committee: F01.18 - Printed Electronics

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F2072 − 14
Standard Test Method for
1
Hosedown of a Membrane Switch
This standard is issued under the fixed designation F2072; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Significance and Use
1.1 This test method establishes procedures for the hose- 4.1 The presence of water inside a membrane switch can
down of a membrane switch to verify adequate protection from affect its mechanical operation or electrical functionality, or
ingress of water from a high-volume water spray. both.
1.2 This test method can also be used to verify the ability of 4.2 This practice establishes a procedure to verify the ability
a membrane switch or graphics layer to act as a liquid seal for of a membrane switch to resist the entry of liquid into itself or
a finished product. a finished product, or both. It is useful in identifying design
deficiencies.
1.3 Additional test methods or practices can be incorporated
to investigate specific results or capabilities. 4.3 Hosedown testing may be destructive, therefore any
samples tested should be considered unfit for future use.
1.4 This test method is a modification of NEMAPublication
Number 250-2008 Section 6.7 which is a test for hosedown of
5. Interferences
a finished product housing.
5.1 External Venting— Any deliberate external venting of
2. Referenced Documents
the switch will allow liquid to enter.
2
2.1 ASTM Standards:
5.2 Atmospheric Pressure—Significant changes in atmo-
F1595 Practice forViewing Conditions forVisual Inspection
spheric pressure during the test or at different facilities may
of Membrane Switches
alter the time in which leakage might occur.
F1680 Test Method for Determining Circuit Resistance of a
5.3 Duration of Test— Longer exposure time increases the
Membrane Switch
possibility of leakage.
F1689 Test Method for Determining the Insulation Resis-
5.4 Dye Coloring—Choose a dye coloring that will not
tance of a Membrane Switch
chemically attack the materials.
2.2 NEMA Publication:
3
250-2008
6. Apparatus
3. Terminology
6.1 Water Supply, capable of delivering a stream of water at
a rate of at least 65 gal/min through a 1 in. (25 mm) internal
3.1 Symbols:
diameter nozzle for the specified duration,
3.1.1 membrane switch, n—a momentary switching device
in which at least one contact is on, or made of, a flexible
6.2 An appropriate device or fixture to hold the switch in a
substrate.
fixed position,
3.1.2 specified resistance, n—maximum allowable resis-
6.3 Any additional equipment as required by other test
tance as measured between two terminations whose internal
methods employed, and
switch contacts, when held closed, complete a circuit.
6.4 Nozzle with 1 in. (25 mm) internal diameter.
1
This test method is under the jurisdiction of ASTM Committee F01 on
7. Test Specimen
Electronics and is the direct responsibility of Subcommittee F01.18 on Membrane
Switches. 7.1 The test specimen will be a membrane switch with or
Current edition approved Jan. 1, 2014. Published January 2014. Originally
without graphics laminated to a rigid material or the final
approved in 2000. Last previous edition approved in 2007 as F2072–01(2007). DOI:
intended mounting configuration (using a clear material will
10.1520/F2072-14.
2
facilitate visual inspection).
For referenced ASTM standards, visit the
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